I lived in the US for a spell as a small child and I remembered a TV programme where the viewer could send for a plastic screen to stick on the TV and then help the main character by drawing in what he needed (a ladder to get out of a pit, for example). No-one in UK had ever heard of it and I never met an American who knew it either. Fortunately one post on an ebay.com board told me that I was not crazy/imagining it but remembering Winky Dink!
http://www.tvparty.com/requested2.html
I had no vision of the character and the name doesn't ring a bell even now, but that's the programme. Isn't the internet wonderful? I would still think I was crazy without it.